说明：  改程序能够实现加窗插值FFT算法的matlab仿真，已经得到实验验证，注解清晰详细，代码可读性强.以512点为例进行仿真计算，对与其他点数，如256或是1024可以通过简单修改即可
(Reform process to achieve the windowed interpolation FFT algorithm matlab simulation, experimental verification has been, clear and detailed annotations, code readability. 512 points as an example to the simulation of other points, such as 256 or 1024 can be simple modifications)